Originally Posted by
Jim Holian
Thanks Jeff. I just talked to a German Import specialty garage near me. They specialize in European Imports, particularly Mercedes and BMW. They told me that to do the job properly they have to use a scan tool to properly bleed the brakes. They said that's the only way to COMPLETELY CLEAR ALL FLUID from the system. I've never heard of that before but I'm not a German car Specialist. This shop comes highly recommended and I guess that all one can do is try them once and see. If it's a rip, I can sure let a lot of people know. If it's good, I can also relate my experience here. I will keep everyone posted on the results. It may take a week or more because they are busy enough that I can't get in for a week. Hope that's a good sign.
Jim
The method involves the activation of the ABS system valves to rid the unit of air bubbles. There has been talk of doing this yourself by driving on a gravel road and applying the brakes frequently to activate the ABS system and force out air from it and then bleeding the brakes to rid the lines and cylinders of the air.
That is what is rumoured but I would think that the bleed valves would need to be open so that the valves would force old fluid and bubbles out while replenishing the unit with fresh brake fluid.